40646231 has 4 divisors (see below), whose sum is σ = 40714464. Its totient is φ = 40578000.

The previous prime is 40646173. The next prime is 40646237. The reversal of 40646231 is 13264604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40646231 is a prime.

It is a super-2 number, since 2×40646231² = 3304232189010722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40646231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40646237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33215 + ... + 34416.

It is an arithmetic number, because the mean of its divisors is an integer number (10178616).

Almost surely, 2^40646231 is an apocalyptic number.

40646231 is a deficient number, since it is larger than the sum of its proper divisors (68233).

40646231 is an equidigital number, since it uses as much as digits as its factorization.

40646231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68232.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 40646231 is about 6375.4396711129. The cubic root of 40646231 is about 343.8270916463.

The spelling of 40646231 in words is "forty million, six hundred forty-six thousand, two hundred thirty-one".